User equipment, base station, and method of transmitting a scheduling request

Abstract

There is provided user equipment of a radio communication system that supports TTIs having a plurality of lengths and that includes a base station and the user equipment, the user equipment including an acquisition unit configured to acquire, from the base station, information indicating a plurality of UL resources which are allocated to a plurality of symbols included in a TTI having a predetermined length and with which a scheduling request can be transmitted; and a transmission unit configured to select a UL resource from the plurality of UL resources and transmit the scheduling request to the base station with the selected UL resource.

The invention claimed is: 
     
       1. A terminal comprising:
 a receiver that receives, from a base station, configuration information including a configuration that includes an assignment, by time division multiplexing, of a plurality of scheduling request (SR) resources within one slot, the configuration information indicating a plurality of SR resource candidates, and receives information indicating a number of SR transmissions within the slot; 
 a processor that determines an SR resource for transmitting a SR based on the configuration information and stored one or more logical channels; and 
 a transmitter that transmits, to the base station, the SR with the SR resource, 
 wherein the receiver receives uplink scheduling control information, 
 wherein the uplink scheduling control information includes a priority identifier related to the one or more logical channels, and 
 wherein the processor determines whether uplink data on the one or more logical channels is transmitted based on the priority identifier related to the one or more logical channels. 
 
     
     
       2. The terminal according to  claim 1 , wherein the SR resource is configured within a frequency band for transmitting a control signal. 
     
     
       3. The terminal according to  claim 1 , wherein transmission of the SR involves transmission of a reference signal. 
     
     
       4. The terminal according to  claim 1 , wherein the processor generates a sequence based on the SR to be transmitted, and the transmitter transmits the sequence, as the SR. 
     
     
       5. The terminal according to  claim 1 ,
 wherein, when the determined SR resource overlaps with an uplink resource assigned by the scheduling control information, the transmitter drops transmission using the uplink resource. 
 
     
     
       6. A communication method by a terminal, the method comprising:
 receiving, from a base station, configuration information including a configuration that includes an assignment, by time division multiplexing, of a plurality of scheduling request (SR) resources within one slot, the configuration information indicating a plurality of SR resource candidates; 
 receiving information indicating a number of SR transmissions within the slot; 
 determining an SR resource for transmitting a SR based on the configuration information and stored one or more logical channels; and 
 transmitting, to the base station, the SR with the SR resource, 
 wherein the method further comprises receiving uplink scheduling control information, 
 wherein the uplink scheduling control information includes a priority identifier related to the one or more logical channels, and 
 wherein the determining determines whether uplink data on the one or more logical channels is transmitted based on the priority identifier related to the one or more logical channels. 
 
     
     
       7. A radio communication system comprising:
 a terminal; and 
 a base station, 
 
       wherein the terminal includes:
 a receiver that receives, from the base station, configuration information including a configuration that includes an assignment, by time division multiplexing, of a plurality of scheduling request (SR) resources within one slot, the configuration information indicating a plurality of SR resource candidates, and receives information indicating a number of SR transmissions within the slot; 
 a processor that determines an SR resource for transmitting a SR based on the configuration information and stored one or more logical channels; and 
 a transmitter that transmits, to the base station, the SR with the SR resource, 
 wherein the receiver receives uplink scheduling control information, 
 wherein the uplink scheduling control information includes a priority identifier related to the one or more logical channels, and 
 wherein the processor determines whether uplink data on the one or more logical channels is transmitted based on the priority identifier related to the one or more logical channels, and 
 
       wherein the base station includes a transmitter that transmits the configuration information to the terminal.